JWT Analyzer & Visualizer – Decode, Validate, and Secure Your JSON Web Tokens

JWT Analyzer & Visualizer

The JWT Analyzer & Visualizer is a powerful, client-side tool for inspecting and validating JSON Web Tokens (JWTs). Whether you’re debugging authentication flows, checking expiration dates, or verifying the HMAC signature of a token, this tool makes it easy with a sleek, modern interface and live decoding.

🔍 Features Include:

Instant decoding of JWT header, payload, and signature
Live HMAC-SHA256 signature validation (optional secret input)
Interactive token expiration analyzer
Modern responsive UI with dark/light mode switch
Client-side only – no network requests

Useful for developers and IT pros working with secure APIs, OAuth2, or token-based authentication. Designed to work alongside tools like the Regex Tester and HTTP Header Inspector.

🔗 Learn more about JWTs from Auth0.

🔐 Try the JWT Analyzer Tool

Skylar Pearce

My name is Skylar Pearce, I have been working as a System Administror since 2013 as well some side consulting work. During my career I have worked with everything from Active Directory and vCenter to configuring routers and switches and phone systems, documenting and scripting my way through the whole thing. I have a Security+ certification and am currently working on my PenTest+. Throughout my career I have gained almost all of my knowledge from blogs like this. It is now time for me to pay it back. Over time I have gathered scripts and tricks over the years that I will share on this site. A lot of the posts here will be mainly reference posts, some will be full on how to’s. I am happy to go into more depth on any other topics I go over here, just make a comment on a post. I will do my best to post once a day on weekdays but as I run out of ideas it may slow down. My WordPress skills are still growing so the site will likely get better over time as I learn. You can reach me at contact@allthesystems.com or on LinkedIn